Musnad Abi Ya'la 1069 — he said: I saw in a dream as if I were under

It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that he said: I saw in a dream as if I were under a tree, and the tree was reciting Surah Sad. When it reached the verse of prostration, it prostrated and recited this supplication in its prostration: 'Allahumma-ghfir li biha, Allahumma hutta 'anni biha wizran, wa ahdith li biha shukran, wa taqabbalha minni kama taqabbalta min 'abdika Dawuda sajdatahu' (O Allah, forgive me by the blessing of this prostration; through it remove my burden from me; by it create in me gratitude; and accept it from me just as You accepted the prostration of Your servant Dawud (peace be upon him)). So in the morning I went to the Messenger of Allah (peace and blessings be upon him) and told him (peace and blessings be upon him) of this dream. He (peace and blessings be upon him) asked: "O Abu Sa'id! Did you also prostrate?" I said: No. He (peace and blessings be upon him) said: "You were more entitled to prostrate than the tree." Then the Messenger of Allah (peace and blessings be upon him) recited Surah Sad, and when he reached the verse of prostration he (peace and blessings be upon him) prostrated and said in his prostration the same words that the tree had said in its prostration.